The Temporomandibular Joint: Theory of Reflex Controlled Nonlever Action of the Mandible

Robinson, Marsh

doi:10.14219/jada.archive.1946.0176

Cited by 80 publications

(13 citation statements)

References 2 publications

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“…Other investigators nevertheless have argued that the condyle and articular fossa are simply not designed by nature to withstand the large resultant forces required by the model . The class III lever model has also been criticized, as it does not take into consideration the center of mandibular rotation …”

Section: Biomechanics Of the Mandiblementioning

confidence: 99%

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Biomechanics and functional distortion of the human mandible

Choi

Conway

Taraschi

et al. 2014

J of Invest & Clin Dent

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The reaction to the use of finite element analysis (FEA) in the study of the human body has been particularly enthusiastic. Of equal and challenging complexity is the investigation of load/stress distribution and morphological distortion of the human mandible under functional loads. Furthermore, the mandible also impacts directly on body function and esthetics, playing a vital role, such as mastication and speech. The application of FEA to the biomechanical investigation of the oral systems, such as human teeth and mandibular bone remodeling, began in the early 1970s. The clinical significance of jaw deformation is unknown. The primary concern is that deformation might result in an ill-fitting superstructure or the creation of harmful strains in the patient-implant complex. Although mandibular implant treatment has a high success rate, the possibility of failure caused by these dimensional changes and the related micromotion cannot be ignored.

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Section: Biomechanics Of the Mandiblementioning

confidence: 99%

“…Robinson was another worker expressing disagreement with the lever action of the mandible concept . This was based on the information that the resultant adductor muscle force passes through the first molar tooth.…”

Section: Biomechanics Of the Mandiblementioning

confidence: 99%

Biomechanics and functional distortion of the human mandible

Choi

Conway

Taraschi

et al. 2014

J of Invest & Clin Dent

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“…Biomeckanical considerations have focused extensive1 on the relationship between the mandi 8 le and temporal bone durin mastication, and have led to considerable as a lever (Hylander, 1975;Picq et al, 19871, joint. A rapid rise in these disor rt ers among tematic methodology for the de B inition, diagde % ate as to whether the mandible functions a link (Robinson, 1946;Taylor, 19861, or both (Gingerich, 1979). Hylander (1975) provided a detailed description of this debate and argued strongly in favor of the lever hypothesis.…”

Section: Attritionmentioning

confidence: 99%

“…A rapid rise in these disor rt ers among tematic methodology for the de B inition, diagde % ate as to whether the mandible functions a link (Robinson, 1946; Taylor, 19861, or both (Gingerich, 1979). Hylander (1975) provided a detailed description of this debate and argued strongly in favor of the lever hypothesis.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical association of dental and temporomandibular pathology in a medieval Nubian population

Sheridan¹,

Mittler²,

Gerven³

et al. 1991

American J Phys Anthropol

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An analysis of the relationship between oral pathology and degenerative change at the temporomandibular joint (TMJ) was undertaken on an archaeological sample of 122 adult crania from the Medieval site of Kulubnarti in Sudanese Nubia. The crania were sorted into 2 groups: those demonstrating clearly visible bony changes at the joint (TMJ+) and those without visible change (TMJ-). These groups were compared according to 1) age; 2) sex; 3) active dental pathologies (abscesses, caries, partial socket resorption); 4) tooth loss with complete socket resorption; and 5) dental attrition. No statistically significant association was evident between degenerative change at the TMJ and age, active dental pathologies, or dental attrition; however, sex differences and posterior tooth loss with complete socket resorption revealed a significant correspondence to degenerative TMJ changes. Both of these factors agree with the clinical literature and with biomechanical models (most notably that of Hylander) based upon modern populations. Furthermore, the results support the contention that paleopathological conditions can be analyzed from a clinical and functional biomechanical perspective.

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“…In these models, it has been assumed that the bone is a rigid structure, and as such behaves according to static equilibrium theory. 10,11 Mathematical models necessarily assume structural rigidity and concentricity in the sagittal view, factors that complicate the analysis and limit their usefulness. Such restrictions encourage the development of models, which are more representative of nonrigid, inhomogeneous structures, and which allow the simulation of wide areas of muscle attachment.…”

Section: Introductionmentioning

confidence: 99%

Development of a three‐dimensional finite element model of a human mandible containing endosseous dental implants. I. Mathematical validation and experimental verification

Al-Sukhun

Kelleway

Helenius

2006

J Biomedical Materials Res

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The purpose of this study was to mathematically validate and clinically verify a finite element model (FEM) of the human mandible and to compare the functional deformation predicted by the model with that detected clinically. Mandibular surface strain, using 11 single strain gauges, and medial convergence (MC), using a custom-fabricated linear variable differential transformer (LVDT), were recorded in a dried human jaw. The mandible was treated with two endosseous implants, placed bilaterally in the premolar area, and mounted in a rig that simulated natural function of the jaw. Measurements were made in real time using a multichannel analogue/digital converter and a personal computer for data storage and analysis. A FEM of the mandible was constructed, using commercially available finite element software, based on CT scan images of the jaw. MC was predicted as the linear change in the orientation of the two implants in the horizontal plane. Predicted and measured values of MC ranged between 60 and 109 mm. The differences between the measured and predicted strain magnitudes were expressed as absolute percentages of the measured values and ranged between 3 and 18%. The limits of agreement between the predicted and measured strain values, as suggested by Bland and Altman (Lancet 1986; 1:307-310), were small enough for the predictions from the FEM to be considered clinically acceptable. The good agreement between the predicted and measured strain values indicates the accuracy of the present FEM. Finite element analysis is a powerful technique that provides a better insight into understanding the complex phenomena of mandibular functional deformation. 2006 Wiley Periodicals, Inc. J Biomed Mater Res 80A: [234][235][236][237][238][239][240][241][242][243][244][245][246] 2007

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The Temporomandibular Joint: Theory of Reflex Controlled Nonlever Action of the Mandible

Cited by 80 publications

References 2 publications

Biomechanics and functional distortion of the human mandible

Biomechanics and functional distortion of the human mandible

Biomechanical association of dental and temporomandibular pathology in a medieval Nubian population

Development of a three‐dimensional finite element model of a human mandible containing endosseous dental implants. I. Mathematical validation and experimental verification

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